IL-6、IL-1及TNF对人类骨髓瘤细胞系KM_2、KM_3增殖的影响

细胞因子的异常表达对骨髓瘤细胞的恶性增殖起重要作用。本文研究了IL-6、IL-1及TNF 对人骨髓瘤细胞系增殖的影响。KM_2、KM,均能分泌IL-6,以维持自身的增殖。培养体系中加入抗IL-6抗体可抑制瘤细胞的增殖,这种抑制作用可通过加入重组IL-6而逆转.在培养体系中加入重组IL-6和TNF 均可促进KM_2、KM_3的增殖,而IL-1无此作用。培养体系中加入TNF 培养后,上清中IL-6活性增高。我们的结果提示,人骨髓瘤细胞系KM_2、KM_3存在IL-6自分泌增殖机制,而TNF 可加强这种自分泌作用。     

恶性肿瘤患者血清sIL—2R的检测

本文采用ELISA夹心法,对66例恶性肿瘤患者血清中可溶性白细胞介素2受体进行检测,以39例健康学生做对照,结果显示恶性肿瘤患者血清slL-2R 含量明显高于对照组(P<0.01)。并对血清sIL-2R 水平在肿瘤诊断及预后判断中的意义进行了探讨。     

The role of serum in interleukin 1 production by human monocytes activated by endotoxins and their polysaccharide moieties

Lipopolysaccharides (LPS) as well as polysaccharide (PS) moieties of Bordetella pertussis and Neisseria meningitidis endotoxins induced in vitro interleukin 1 (IL 1) secretion by human monocytes as evaluated by the co-mitogenic assay on C3H/HeJ thymocytes. Because of the role of serum in the specific binding of endotoxins to monocytes mediated by the polysaccharide region [12], experiments were undertaken to study the effect of serum on IL 1 induction. Although the presence of serum is not necessary for the secretion of IL 1 by monocytes stimulated by LPS or PS, the addition of very small amounts of human serum (0.1-1.6%) to the cultures of human adherent cells potentiated the IL 1 secretion, without modifying the background values. Natural anti-B. pertussis antibodies present in the serum were not responsible for the observed phenomenon. Heating at 56 degrees C for 30 min did not alter the enhancing effect. The data presented suggest that the serum component(s) and the IL 1 inducers (LPS or PS) act in synergism by two different pathways since the two signals can be delivered sequentially.     

Cytokine regulation of Group II phospholipase A2 expression in glomerular mesangial cells

Phospholipase A₂ (PLA₂) is believed to play an essential role in inflammatory processes by releasing arachidonic acid from membrane phospholipids for synthesis of important lipid mediators, such as prostaglandins, leukotrienes and platelet activating factor.We have used glomerular mesangial cells as a model system to study the regulation of PLA₂ under inflammatory conditions. Potent pro-inflammatory cytokines, such as interleukin 1 (IL-1) and tumour necrosis factor (TNF), as well as agents that increase cellular cAMP levels have been found to increase Group II PLA₂ gene expression in a time- and dose-dependent manner.     

IL-2联合吡柔比星膀胱灌注预防膀胱癌复发

目的：探讨生物制剂联合化疗药物膀胱灌注预防膀胱癌术后复发的机制。方法：对比研究白细胞介素2（IL－2）和吡柔比星联合膀胱灌注与单用吡柔比星膀胱灌注前后患者血、尿肿瘤坏死因子（TNF）和血IL－2受体的动态变化。结果：联合膀胱灌注组的TNF和IL－2受体水平显著高于吡柔比星组（P＜0．01）。结论：联合灌注组机体的细胞免疫功能得到更好改善,IL－2增加肿瘤细胞对免疫反应的应答,两者间有免疫促进及协同作用。     

豚鼠过敏性脑脊髓炎CNS中IL-1R的表达

目的 探索中枢神经系统脱髓鞘疾病进程中IL－1R的表达与神经胶质细胞活化的关系。方法 用牛脊髓髓鞘碱性蛋白加完全福氏佐剂对豚鼠进行免疫,诱发实验性过敏性脑脊髓炎（EAE）模型,采用免疫组化方法对EAE不同时期中枢神经系统中IL－1R的表达进行研究,同时采用抗蓖 凝集素RCA－1标记小胶质细胞、抗胶质纤维酸性蛋白标记星型胶质细胞。结果 在EAE症状出现之前3d至临床高峰期,小胶质细胞样细胞呈现IL－1R免疫反应阳性,表达IL－1R的星型胶质细胞样细胞呈活化状态,而恢复期则主要为星型胶质细胞样细胞呈现免疫反应阳性。结论 在EAE不同时期表达IL－1受体的细胞型不同与不同时期神经胶质细胞的活化类型有关,即与EAE早期小胶质细胞的活化和恢复期星型胶质细胞增生有关。     

哮喘豚鼠嗜酸细胞IL-5、IL-3和GM-CSF受体mRNA表达及意义

目的　观察白介素 5受体α(IL 5Rα)、IL 3Rα、粒细胞 巨噬细胞集落刺激因子受体α(GM CSFRα)及共同 β链 (βcR)mR NA表达与嗜酸粒细胞 (Eos)凋亡的关系 ,探讨各受体在哮喘发病中的作用。方法　健康豚鼠随机分为正常组、哮喘组 (卵蛋白致敏激发 ) ,以TUNEL法检测支气管灌洗液 (BALF)中低密度Eos(HEos)及正常密度Eos(NEos)细胞凋亡 ,原位杂交及RT PCR法检测各受体mRNA表达。结果　哮喘组Eos显著高于正常组 ,以HEos为著 (P <0 .0 1) ;Eos凋亡率明显低于正常组 (P <0 .0 1) ,HEos表达IL 3Rα、GM CSFRα明显高于NEos ;哮喘组不同密度Eos表达各受体αmRNA明显下降 ,而 βcRmRNA表达明显增加。RT PCR检测IL 5Rα、IL 3RαmRNA相对含量 ,哮喘组显著低于正常组 (P <0 .0 1)。结论　哮喘Eos存在凋亡抑制 ,其IL 5、IL 3和GM CSF受体的表达可能通过两种机制调节 :各自α链表达减少 ,使其对Eos活化及凋亡抑制的负调节减弱 ;共同 β链表达增加 ,使其对Eos活化和凋亡抑制的正性调节增强。表明IL 5等细胞因子受体可以通过调节Eos凋亡参与哮喘发病。     

IL-6对脑缺血后大鼠海马及纹状体神经细胞Fos表达的影响

使用免疫组织化学方法 ,观察了大鼠大脑中动脉区缺血再灌注动物模型中海马 Fos的表达及 IL- 6对其表达的影响。结果发现 :经侧脑室注射 IL- 6后大鼠海马及纹状体神经细胞 Fos的表达明显低于单纯缺血再灌注动物组。表明 IL- 6对脑缺血再灌注后大鼠海马及纹状体神经细胞 Fos表达的增加有明显的抑制作用。提示 IL- 6可能参与缺血性脑损伤的调控过程。     

Chemical conjugation of a novel antibody-interleukin 2 immunoconjugate agains t c-erbB-2 product

Objective To develop a new chemical method to produce a monoclonal antibody (MoAb) 520C9/recombinant human interleukin 2 (rhIL-2) conjugate. Methods MoAb 520C9 reactive with the protooncogene c-erbB-2 product P185 was chemically conjugated with rhIL-2 by using a simple two-step method.First, the rhIL-2 was activated by Sulfosuccinimidyl 4-［N-maleimidomethyl］ cyclohexane-1-carboxylate, a heterobifunctional linker, and N-succinimidyl s-acetylthioacetate was introduced onto 520C9.Then SATA on the 520C9 was reacted with the maleimide group on the activated rhIL-2 to generate 520C9-rhIL-2 immunoconjugate. Results The immunoconjugate retained the antigen binding activity compared to the respective native antibody as determined by an indirect live cell binding assay.The immunoconjugate also possessed IL-2 activity as measured by the standard CTLL-2 cells proliferation assay and the stimulation of human peripheral blood mononuclear cells (PBMCs) into lymphokine-activated killer cells. Conclusion Our method of conjugation of rhIL-2 to 520C9 preserves the binding activity of the antibody and the cytokine function of IL-2.This simple and efficient method of conjugation should be applicable to other types of MoAbs and recombinant cytokines.     

烧伤患者血清sIL-2R水平的观察及临床意义

为探讨烧伤患者伤后免疫功能紊乱的可能机制以及烧伤患者病情监测、免疫状况评估的观察指标 ,动态观察了 35例大面积烧伤患者伤后一周、二周、三周及四周血清可溶性白介素 - 2受体 (s IL - 2 R)水平 ,并据烧伤严重程度分中、重、特重度烧伤组进行比较观察。结果发现 :(1)烧伤患者 s IL- 2 R水平明显高于正常对照组 (P<0 .0 1) ,至伤后四周仍无恢复 ;(2 )特重度烧伤患者 s IL- 2 R水平明显高于重度烧伤患者 ,重度烧伤患者 s IL- 2 R水平明显高于中度烧伤患者 (P<0 .0 1)。结论 :升高的 s IL- 2 R是影响烧伤患者免疫功能的众多原因中的重要原因之一 ,伤后 s IL- 2 R水平的观察对烧伤患者病情的监测及免疫状况的评估有一定的临床意义。